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scsi: megaraid: Avoid mismatched storage type sizes

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Remove needless use of mbox_t, replacing with just struct
mbox_out. Silences compiler warnings under a -Warray-bounds build:

drivers/scsi/megaraid.c: In function 'megaraid_probe_one':
drivers/scsi/megaraid.c:3615:30: error: array subscript 'mbox_t[0]' is partly outside array bounds of 'unsigned char[15]' [-Werror=array-bounds]
 3615 |         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
      |         ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/megaraid.c:3599:23: note: while referencing 'raw_mbox'
 3599 |         unsigned char raw_mbox[sizeof(struct mbox_out)];
      |                       ^~~~~~~~

Link: https://lore.kernel.org/r/20220105173633.2421129-1-keescook@chromium.org
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: megaraidlinux.pdl@broadcom.com
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kees Cook 2022-01-05 09:36:33 -08:00 committed by Martin K. Petersen
parent 5d9224fb07
commit 315d049ad1
1 changed files with 34 additions and 50 deletions
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84
drivers/scsi/megaraid.c
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@ -192,23 +192,21 @@ mega_query_adapter(adapter_t *adapter)
{
dma_addr_t prod_info_dma_handle;
mega_inquiry3 *inquiry3;
u8 raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
u8 *raw_mbox = (u8 *)&mbox;
int retval;
/* Initialize adapter inquiry mailbox */
mbox = (mbox_t *)raw_mbox;
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
/*
* Try to issue Inquiry3 command
* if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
* update enquiry3 structure
*/
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
@ -232,10 +230,10 @@ mega_query_adapter(adapter_t *adapter)
inq = &ext_inq->raid_inq;
mbox->m_out.xferaddr = (u32)dma_handle;
mbox.xferaddr = (u32)dma_handle;
/*issue old 0x04 command to adapter */
mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
mbox.cmd = MEGA_MBOXCMD_ADPEXTINQ;
issue_scb_block(adapter, raw_mbox);
@ -262,7 +260,7 @@ mega_query_adapter(adapter_t *adapter)
sizeof(mega_product_info),
DMA_FROM_DEVICE);
mbox->m_out.xferaddr = prod_info_dma_handle;
mbox.xferaddr = prod_info_dma_handle;
raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; /* i.e. 0x0E */
@ -3569,16 +3567,14 @@ mega_n_to_m(void __user *arg, megacmd_t *mc)
static int
mega_is_bios_enabled(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
mbox = (mbox_t *)raw_mbox;
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
raw_mbox[0] = IS_BIOS_ENABLED;
raw_mbox[2] = GET_BIOS;
@ -3600,13 +3596,11 @@ mega_is_bios_enabled(adapter_t *adapter)
static void
mega_enum_raid_scsi(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
int i;
mbox = (mbox_t *)raw_mbox;
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
/*
* issue command to find out what channels are raid/scsi
@ -3616,7 +3610,7 @@ mega_enum_raid_scsi(adapter_t *adapter)
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
/*
* Non-ROMB firmware fail this command, so all channels
@ -3655,23 +3649,21 @@ static void
mega_get_boot_drv(adapter_t *adapter)
{
struct private_bios_data *prv_bios_data;
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
u16 cksum = 0;
u8 *cksum_p;
u8 boot_pdrv;
int i;
mbox = (mbox_t *)raw_mbox;
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
raw_mbox[0] = BIOS_PVT_DATA;
raw_mbox[2] = GET_BIOS_PVT_DATA;
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
adapter->boot_ldrv_enabled = 0;
adapter->boot_ldrv = 0;
@ -3721,13 +3713,11 @@ mega_get_boot_drv(adapter_t *adapter)
static int
mega_support_random_del(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
int rval;
mbox = (mbox_t *)raw_mbox;
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
/*
* issue command
@ -3750,13 +3740,11 @@ mega_support_random_del(adapter_t *adapter)
static int
mega_support_ext_cdb(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
int rval;
mbox = (mbox_t *)raw_mbox;
memset(&mbox->m_out, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
/*
* issue command to find out if controller supports extended CDBs.
*/
@ -3865,16 +3853,14 @@ mega_do_del_logdrv(adapter_t *adapter, int logdrv)
static void
mega_get_max_sgl(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
mbox = (mbox_t *)raw_mbox;
memset(mbox, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
raw_mbox[0] = MAIN_MISC_OPCODE;
raw_mbox[2] = GET_MAX_SG_SUPPORT;
@ -3888,7 +3874,7 @@ mega_get_max_sgl(adapter_t *adapter)
}
else {
adapter->sglen = *((char *)adapter->mega_buffer);
/*
* Make sure this is not more than the resources we are
* planning to allocate
@ -3910,16 +3896,14 @@ mega_get_max_sgl(adapter_t *adapter)
static int
mega_support_cluster(adapter_t *adapter)
{
unsigned char raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
struct mbox_out mbox;
unsigned char *raw_mbox = (u8 *)&mbox;
mbox = (mbox_t *)raw_mbox;
memset(mbox, 0, sizeof(raw_mbox));
memset(&mbox, 0, sizeof(mbox));
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
mbox.xferaddr = (u32)adapter->buf_dma_handle;
/*
* Try to get the initiator id. This command will succeed iff the